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Bull sharks are one of the most common and aggressive types of sharks. Although they mainly inhabit bodies of saltwater, they can tolerate freshwater. Fish biologist Zeb Hogan has found that young bull sharks tend to use freshwater areas as nurseries where they can feed and grow in relative safety from predators.

Despite the prevalence of sharks in Chesapeake Bay, few shark attacks are reported along the Maryland coast. One reason is that Maryland's coastline is relatively short, but the large jellyfish population during the summer also is a factor. Few people choose to venture into the water, preferring to avoid encounters with jellyfish.